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Type: Theses
Title: Modelling the wave-induced collisions of ice floes
Author: Yiew, Lucas Jinliang
Issue Date: 2017
School/Discipline: School of Mathematical Sciences
Abstract: The wave-induced collisions and rafting of ice floes are investigated experimentally and theoretically. Results from a series of wave basin experiments are presented. Ice floes are simulated experimentally using thin plastic disks. The first round of experiments focusses on measuring the oscillatory surge, heave, pitch and drift motions of solitary floes. The second and third rounds of experiments record the motions of two adjacent floes. Rafting is suppressed in the second round, and allowed in the third round. Collision and rafting regimes are identified, and collision behaviours are quantified over a range of incident wavelengths and wave amplitudes. Two mathematical models are proposed to model the wave-induced motions of solitary floes. The first is based on slope-sliding theory, and the second is based on linear potential-ow theory. Both models are validated using results from the single-floe experiments. Model-data comparisons show that the slope-sliding model is valid in the long-wavelength regime, and potential-ow model is more accurate in shorter wavelengths. A two-floe collision model is then developed to replicate the conditions of the two-floe experiments. Slope-sliding theory is used to model floe motions. A time-stepping algorithm is implemented to determine the occurrence of collision and rafting events. Predicted collision behaviours are compared with results from the two-floe experiments. Good agreement is attained in incident waves of intermediate to long wavelengths.
Advisor: Bennetts, Luke
Meylan, Mike
Dissertation Note: Thesis (Ph.D.) -- University of Adelaide, School of Mathematical Sciences, 2017.
Keywords: sea ice
ocean waves
hydrodynamics
Provenance: This electronic version is made publicly available by the University of Adelaide in accordance with its open access policy for student theses. Copyright in this thesis remains with the author. This thesis may incorporate third party material which has been used by the author pursuant to Fair Dealing exceptions. If you are the owner of any included third party copyright material you wish to be removed from this electronic version, please complete the take down form located at: http://www.adelaide.edu.au/legals
DOI: 10.4225/55/59261a1950cd6
Appears in Collections:Research Theses

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